Home / 418,629.60-627,944.40-396,978.30

Finding the Fourth Proportional to 418,629.60, 627,944.40 and 396,978.30

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Solution

The fourth proportional to 418,629.60, 627,944.40 and 396,978.30 is: 595,467.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,629.60 : 627,944.40 = 396,978.30 : x
  2. Step 2: Convert to fraction form
    418,629.60/627,944.40 = 396,978.30/x
  3. Step 3: Cross multiply
    418,629.60x = 627,944.40 × 396,978.30
  4. Step 4: Simplify right side
    418,629.60x = 249,280,300,406.52
  5. Step 5: Solve for x
    x = 249,280,300,406.52/418,629.60
  6. Step 6: Final answer
    x = 595,467.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.